This happened a long time ago so the following should not be taken as fact because I may have mixed up two different memories.

In that Cambridge Astronomy place in England I saw a poster about 'maverick stars'. Astronomers are puzzled as to what they actually are but from what they can see, these maverick stars are extremely big and exist outside galaxies. They also shine much brighter than the centre of most galaxies.

I tried to search for information on them on the net but this is the best I could get, it?s not very clear; http://www.ast.cam.ac.uk/~ljw/public/Talks/talk.html?talk=ERW/

If anyone has any information on maverick stars please post it. Otherwise, please teach me some techniques to get better results on search engines.

P.S. My personal theory is that maverick stars are matter and antimatter reactions

A supermassive black hole is a black hole with a mass in the range of millions or billions of solar masses. It is currently thought that most if not all galaxies, including the Milky Way, contain a supermassive black hole at their galactic centers.

http://en.wikipedia.org/wiki/Supermassive_black_hole

Black holes shine?

How bright?

"Maverick Black Holes Discovered"

http://www.space.com/scienceastronomy/astronomy/maverick_black_hole_000113.html

In 2000 Notre Dame scientists called them Bret Maverick, Jr.,
and Marshal Zane Cooper, after 1994's Maverick movie characters.
Did IAU ever adopt the South Bend Maverick and Cooper names officially?

If not, what are their names?

"Black holes shine?"
I doubt they do. The shine from the black hole at the centre of galaxies is probably a massive collection of stars gravitating towards them.